Changzhou Junhua Company Technical Data: PI Characteristics Advantages

PEEK and PI material overview and characteristics, advantages and disadvantages

1. Material Overview

PEEK and PI are high-performance materials synthesized and patented by Victrex of the UK and DuPont of the US respectively. PEEK and PI have excellent comprehensive properties that other general plastics cannot match among high-performance polymers. They have excellent performance suitable for various harsh environments and have been successfully and widely used in various industries such as aerospace, automobiles, electronic semiconductors, and electromechanical, which have relatively demanding occasions. They are the preferred materials for users to develop new products and improve product service life and reliability.

2. Features and advantages

◆ High temperature resistance 

The long-term use temperature of the US UL certification is 260 ℃ . Even when the temperature reaches 300 ℃ , it can still maintain excellent mechanical properties.

◆ Abrasion resistance 

In many extremely harsh application environments such as high temperature, high load, and strong corrosion, PEEK polymers and their composite materials have good wear resistance.

◆ Self-lubricating 

It has a low friction coefficient, can achieve oil-free lubrication, and can work for a long time in media such as oil, water, steam, weak acid and alkali.

◆ Corrosion resistance 

It is insoluble in common solvents and has good corrosion resistance to various organic and inorganic chemical reagents.

◆ High strength 

It has good mechanical strength among plastics. It also has high rigidity and surface hardness.

◆ Easy to process 

Parts can be directly processed by injection molding. Post-processing such as turning, milling, drilling, tapping, bonding and ultrasonic welding can be performed.

◆ Hydrolysis resistance 

Even when immersed in steam at a temperature exceeding 250 °C or in high-pressure water, PEEK products can still work continuously for thousands of hours without any significant performance degradation.

◆ Flame retardancy 

Without using any additives, the flammability rating of the 1.45 mm thick PEEK sample is UL94 V-0 .

◆ Low smoke and non-toxic 

The amount of smoke and toxic gases during combustion is extremely low.

◆ Electrical performance 

It can maintain stable and excellent electrical properties within a wide range of temperature and frequency.

◆ Radiation resistance 

It has extremely strong resistance to high-dose gamma- ray radiation , and its mechanical properties can be fully preserved, so it can be used as radiation-resistant parts in nuclear equipment.

◆ Dimensional stability 

shortcoming

■  The injection process is demanding and the machining process has high requirements.

■  The strength is somewhat lower than that of metal materials.